struct FwVersion{
    unsigned vendorId    : 3;
    unsigned hwCfgId     : 5;
    unsigned productId   : 8;
    unsigned releaseType : 3;
    unsigned buildNo     : 13;
};
// [0, 3] = [hhhh'hvvv, pppp'pppp, bbbb'brrr, BBBB'BBBB]
static_assert(sizeof(FwVersion) == 4);